Investigating Materials

Gap-fill exercise

Fill in all the gaps, then press "Check" to check your answers. Use the "Hint" button to get a free letter if an answer is giving you trouble. You can also click on the "[?]" button to get a clue. Note that you will lose points if you ask for hints or clues!
1. waste is the waste that is processed from markets and food stalks.
2. Chemical waste discharge into drains is an way of disposal.
3. Harmful gases from factories, motor vehicles and open burning can cause air pollution and .
4. Recycling centres will buy waste that can be reused and .
5. The organic waste will decay and become to plants.
6. Decaying waste in the water will lower the content to aquatic animals to live on.
7. can cause food to spoil.
8. of fruit and vegetable can prevent growth of fungi and loss of moisture.
9. Food preservation, is a process of making the food lasts longer and prevents food .
10. Vacuum packing prevents food from spoiling because there is no .